1090747261 has 8 divisors (see below), whose sum is σ = 1112573880. Its totient is φ = 1068966912.

The previous prime is 1090747241. The next prime is 1090747267. The reversal of 1090747261 is 1627470901.

It can be written as a sum of positive squares in 4 ways, for example, as 8732025 + 1082015236 = 2955^2 + 32894^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1090747261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1090747261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090747267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38161 + ... + 60313.

It is an arithmetic number, because the mean of its divisors is an integer number (139071735).

Almost surely, 2^1090747261 is an apocalyptic number.

It is an amenable number.

1090747261 is a deficient number, since it is larger than the sum of its proper divisors (21826619).

1090747261 is an equidigital number, since it uses as much as digits as its factorization.

1090747261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23135.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1090747261 is about 33026.4630410221. The cubic root of 1090747261 is about 1029.3775926739.

The spelling of 1090747261 in words is "one billion, ninety million, seven hundred forty-seven thousand, two hundred sixty-one".